driver core: fw_devlink: Improve check for fwnode with no device/driver

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[ Upstream commit 411c0d58ca ]

fw_devlink shouldn't defer the probe of a device to wait on a supplier
that'll never have a struct device or will never be probed by a driver.
We currently check if a supplier falls into this category, but don't
check its ancestors. We need to check the ancestors too because if the
ancestor will never probe, then the supplier will never probe either.

Signed-off-by: Saravana Kannan <saravanak@google.com>
Tested-by: Colin Foster <colin.foster@in-advantage.com>
Tested-by: Sudeep Holla <sudeep.holla@arm.com>
Tested-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Luca Weiss <luca.weiss@fairphone.com> # qcom/sm7225-fairphone-fp4
Link: https://lore.kernel.org/r/20230207014207.1678715-3-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: 3fb16866b5 ("driver core: fw_devlink: Make cycle detection more robust")
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Saravana Kannan 2023-02-06 17:41:54 -08:00 • committed by Greg Kroah-Hartman

parent 1392204a98

commit 1b5f2cd799

1 changed files with 38 additions and 2 deletions

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drivers/base/core.c

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